NMT: Fixes on channel coding/handling

src/nmt/countries.c

@@ -95,7 +95,7 @@ static struct nmt_frequency frq_900_tr[] = {
 
 /* channel allocation used in France */
 static struct nmt_frequency frq_900_f[] = {
-	{   1,	540,	430.050,	0.025,	1.0,	-10.0,	0 },
+	{   1,	540,	440.0125,	0.025,	1.0,	-10.0,	0 },
 	{   0,	0,	0.0,		0.0,	0.0,	0.0,	0 }
 };
 
@@ -156,7 +156,7 @@ static struct nmt_country {
 	{ 900, 0, 5, 1,9,	"CH",	"Switzerland",		"PTT",				frq_900_scandinavia },
 	{ 900, 0, 6, 1,15,	"NL",	"Netherlands",		"Royal Dutch Post & Telecom",	frq_900_nl },
 	{ 900, 0, 1, 1,9,	"TR",	"Turkey",		"Turkcell",			frq_900_tr },
-	{ 900, 0, 0, 1,9,	"F0",	"France (Group 0)",	"France Telecom",		frq_900_f },
+	{ 900, 0,10, 1,9,	"F0",	"France (Group 0)",	"France Telecom",		frq_900_f },
 	{ 900, 0, 1, 1,9,	"F1",	"France (Group 1)",	"France Telecom",		frq_900_f },
 	{ 900, 0, 2, 1,9,	"F2",	"France (Group 2)",	"France Telecom",		frq_900_f },
 	{ 900, 0, 3, 1,9,	"F3",	"France (Group 3)",	"France Telecom",		frq_900_f },

src/nmt/dsp.c

@@ -64,7 +64,7 @@
 #define F1			1200.0
 #define MAX_DISPLAY		1.4	/* something above dBm0 */
 #define DIALTONE_HZ		425.0	/* dial tone frequency */
-#define TX_PEAK_DIALTONE	0.5	/* dial tone peak FIXME */
+#define TX_PEAK_DIALTONE	1.0	/* dial tone peak FIXME: Not found in the specs! */
 #define SUPER_DURATION		0.25	/* duration of supervisory signal measurement */
 #define SUPER_LOST_COUNT	4	/* number of measures to loose supervisory signal */
 #define SUPER_DETECT_COUNT	6	/* number of measures to detect supervisory signal */

src/nmt/frame.c

@@ -481,14 +481,18 @@ static const char *param_ta_450(uint64_t value, int ndigits, enum nmt_direction
 	return result;
 }
 
-static const char *param_ta_900(uint64_t value, int __attribute__((unused)) ndigits, enum nmt_direction __attribute__((unused)) direction)
+static const char *param_ta_900(uint64_t value, int ndigits, enum nmt_direction __attribute__((unused)) direction)
 {
-	static char result[32];
+	static char result[64];
 
-	if ((value & 0x80))
+	if ((value & 0x80)) {
-		sprintf(result, "%" PRIu64 " (Channel No. + 1024)", value & 0x7f);
+		nmt_value2digits(value & 0x7f, result, ndigits);
-	else
+		result[ndigits] = '\0';
-		sprintf(result, "%" PRIu64, value);
+		strcat(result, " (Channel No. + 1024)");
+	} else {
+		nmt_value2digits(value, result, ndigits);
+		result[ndigits] = '\0';
+	}
 
 	return result;
 }
@@ -722,16 +726,9 @@ enum nmt_mt decode_frame_mt(const uint8_t *digits, enum nmt_direction direction,
 				return NMT_MESSAGE_21b;
 			return NMT_MESSAGE_4;
 		case 4:
-			switch((digits[13] << 8) + (digits[14] << 4) + digits[15]) {
+			if (digits[6] || digits[7] || digits[8] || digits[9] || digits[10] || digits[11] || digits[12])
-			case 0x3f3:
-			case 0x3f4:
-			case 0x3f5:
-			case 0x3f6:
-			case 0x000:
 				return NMT_MESSAGE_2e;
-			default:
 			return NMT_MESSAGE_1b;
-			}
 		case 5:
 			if (digits[6] == 15)
 				return NMT_MESSAGE_21c;

src/nmt/main.c

@@ -71,6 +71,7 @@ void print_help(const char *arg0)
     } else {
 	printf("        NMT-900: 3/2 = 6 W, 1 = 1.5 W, 0 = 150 mW\n");
     }
+	printf("        Note: Power level < 2 causes mobile to search longer for a cell.\n");
 	printf(" -Y --traffic-area <traffic area> | list\n");
 	printf("        NOTE: MUST MATCH WITH YOUR ROAMING SETTINGS IN THE PHONE!\n");
 	printf("              Your phone will not connect, if country code is different!\n");
@@ -314,9 +315,16 @@ int main(int argc, char *argv[])
 		num_audiodev = num_kanal;
 		/* set channel types for more than 1 channel */
 		if (num_kanal > 1 && num_chan_type == 0) {
+			if (loopback)
+				chan_type[0] = CHAN_TYPE_TEST;
+			else
 				chan_type[0] = CHAN_TYPE_CC;
-			for (i = 1; i < num_kanal; i++)
+			for (i = 1; i < num_kanal; i++) {
+				if (loopback)
+					chan_type[i] = CHAN_TYPE_TEST;
+				else
 					chan_type[i] = CHAN_TYPE_TC;
+			}
 			num_chan_type = num_kanal;
 		}
 		if (num_supervisory == 0) {
@@ -332,8 +340,11 @@ int main(int argc, char *argv[])
 		fprintf(stderr, "You need to specify as many sound devices as you have channels.\n");
 		exit(0);
 	}
-	if (num_kanal == 1 && num_chan_type == 0)
+	if (num_kanal == 1 && num_chan_type == 0) {
 		num_chan_type = 1; /* use default */
+		if (loopback)
+			chan_type[0] = CHAN_TYPE_TEST;
+	}
 	if (num_kanal != num_chan_type) {
 		fprintf(stderr, "You need to specify as many channel types as you have channels.\n");
 		exit(0);
@@ -404,7 +415,7 @@ int main(int argc, char *argv[])
 
 	/* create transceiver instance */
 	for (i = 0; i < num_kanal; i++) {
-		rc = nmt_create(nmt_system, country, kanal[i], (loopback) ? CHAN_TYPE_TEST : chan_type[i], audiodev[i], use_sdr, samplerate, rx_gain, do_pre_emphasis, do_de_emphasis, write_rx_wave, write_tx_wave, read_rx_wave, read_tx_wave, ms_power, nmt_digits2value(traffic_area, 2), area_no, compandor, supervisory[i], smsc_number, send_callerid, loopback);
+		rc = nmt_create(nmt_system, country, kanal[i], chan_type[i], audiodev[i], use_sdr, samplerate, rx_gain, do_pre_emphasis, do_de_emphasis, write_rx_wave, write_tx_wave, read_rx_wave, read_tx_wave, ms_power, nmt_digits2value(traffic_area, 2), area_no, compandor, supervisory[i], smsc_number, send_callerid, loopback);
 		if (rc < 0) {
 			fprintf(stderr, "Failed to create transceiver instance. Quitting!\n");
 			goto fail;

src/nmt/nmt.c

@@ -389,37 +389,35 @@ void nmt_check_channels(int __attribute__((unused)) nmt_system)
 		}
 	}
 	if ((cca || ccb) && !tc) {
-		if (note)
 		PDEBUG(DNMT, DEBUG_NOTICE, "\n");
-		PDEBUG(DNMT, DEBUG_NOTICE, "*** Selected channel(s) can be used for calling only.\n");
+		PDEBUG(DNMT, DEBUG_NOTICE, "*** Selected channel(s) can be used for control only.\n");
-		PDEBUG(DNMT, DEBUG_NOTICE, "*** No call is possible on this channel.\n");
+		PDEBUG(DNMT, DEBUG_NOTICE, "*** No call is possible.\n");
 		PDEBUG(DNMT, DEBUG_NOTICE, "*** Use at least one 'TC'!\n");
 		note = 1;
 	}
 	if (tc && !(cca || ccb)) {
-		if (note)
 		PDEBUG(DNMT, DEBUG_NOTICE, "\n");
 		PDEBUG(DNMT, DEBUG_NOTICE, "*** Selected channel(s) can be used for traffic only.\n");
-		PDEBUG(DNMT, DEBUG_NOTICE, "*** No call to the mobile phone is possible on this channel.\n");
+		PDEBUG(DNMT, DEBUG_NOTICE, "*** No call to the mobile phone is possible.\n");
 		PDEBUG(DNMT, DEBUG_NOTICE, "*** Use one 'CC'!\n");
 		note = 1;
 	}
 	if (cca && !ccb) {
-		if (note)
 		PDEBUG(DNMT, DEBUG_NOTICE, "\n");
-		PDEBUG(DNMT, DEBUG_NOTICE, "*** Selected channel(s) can be used for calling of MS type A only.\n");
+		PDEBUG(DNMT, DEBUG_NOTICE, "*** Selected channel(s) can be used for control of MS type A only.\n");
-		PDEBUG(DNMT, DEBUG_NOTICE, "*** No call to the MS type B phone is possible on this channel.\n");
+		PDEBUG(DNMT, DEBUG_NOTICE, "*** No call to the MS type B phone is possible.\n");
 		PDEBUG(DNMT, DEBUG_NOTICE, "*** Use one 'CC' instead!\n");
 		note = 1;
 	}
 	if (!cca && ccb) {
-		if (note)
 		PDEBUG(DNMT, DEBUG_NOTICE, "\n");
-		PDEBUG(DNMT, DEBUG_NOTICE, "*** Selected channel(s) can be used for calling of MS type B only.\n");
+		PDEBUG(DNMT, DEBUG_NOTICE, "*** Selected channel(s) can be used for control of MS type B only.\n");
-		PDEBUG(DNMT, DEBUG_NOTICE, "*** No call to the MS type A phone is possible on this channel.\n");
+		PDEBUG(DNMT, DEBUG_NOTICE, "*** No call to the MS type A phone is possible.\n");
 		PDEBUG(DNMT, DEBUG_NOTICE, "*** Use one 'CC' instead!\n");
 		note = 1;
 	}
+	if (note)
+		PDEBUG(DNMT, DEBUG_NOTICE, "\n");
 }
 
 /* Destroy transceiver instance and unlink from list. */